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Theorem bj-1uplex 34444
Description: A monuple is a set if and only if its coordinates are sets. (Contributed by BJ, 6-Apr-2019.)
Assertion
Ref Expression
bj-1uplex (⦅𝐴⦆ ∈ V ↔ 𝐴 ∈ V)

Proof of Theorem bj-1uplex
StepHypRef Expression
1 bj-pr11val 34441 . . 3 pr1𝐴⦆ = 𝐴
2 bj-pr1ex 34442 . . 3 (⦅𝐴⦆ ∈ V → pr1𝐴⦆ ∈ V)
31, 2eqeltrrid 2895 . 2 (⦅𝐴⦆ ∈ V → 𝐴 ∈ V)
4 df-bj-1upl 34434 . . 3 𝐴⦆ = ({∅} × tag 𝐴)
5 p0ex 5250 . . . 4 {∅} ∈ V
6 bj-xtagex 34425 . . . 4 ({∅} ∈ V → (𝐴 ∈ V → ({∅} × tag 𝐴) ∈ V))
75, 6ax-mp 5 . . 3 (𝐴 ∈ V → ({∅} × tag 𝐴) ∈ V)
84, 7eqeltrid 2894 . 2 (𝐴 ∈ V → ⦅𝐴⦆ ∈ V)
93, 8impbii 212 1 (⦅𝐴⦆ ∈ V ↔ 𝐴 ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wcel 2111  Vcvv 3441  c0 4243  {csn 4525   × cxp 5517  tag bj-ctag 34410  bj-c1upl 34433  pr1 bj-cpr1 34436
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4801  df-br 5031  df-opab 5093  df-xp 5525  df-rel 5526  df-cnv 5527  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-bj-sngl 34402  df-bj-tag 34411  df-bj-proj 34427  df-bj-1upl 34434  df-bj-pr1 34437
This theorem is referenced by:  bj-2uplex  34458
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